Just try and track down a
memory card for one - Ebay is probably the cheapest and easiest way to find one, still expensive for what they are though.
That should be right for your saves/profile, but if you've bought content off xbox live you'll need to migrate the licenses to the new console since they're not linked entirely to your profile, but to your xbox as well, otherwise you'll need to always be logged into xbox live to play your arcade games/extra levels for games etc.
You can get the data migration cables too. Ive never tried one but AFAIK that will simply transfer everything from one console to another, not profile specific stuff, again ive never tried it so thats just my understanding.